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setAttributeNS adds a new attribute or changes the value of an attribute with the given namespace and name.

Syntax

element.setAttributeNS(namespace,name,value)
  • namespace is a string specifying the namespace of the attribute.
  • name is a string identifying the attribute by its qualified name; that is, a namespace prefix followed by a colon followed by a local name.
  • value is the desired string value of the new attribute.

Example

var d = document.getElementById("d1"); 
d.setAttributeNS("http://www.mozilla.org/ns/specialspace", "specialspace:align", "center");

Notes

DOM methods dealing with element's attributes:

Not namespace-aware, most commonly used methods Namespace-aware variants (DOM Level 2) DOM Level 1 methods for dealing with Attr nodes directly (seldom used) DOM Level 2 namespace-aware methods for dealing with Attr nodes directly (seldom used)
setAttribute (DOM 1) setAttributeNS setAttributeNode setAttributeNodeNS
getAttribute (DOM 1) getAttributeNS getAttributeNode getAttributeNodeNS
hasAttribute (DOM 2) hasAttributeNS - -
removeAttribute (DOM 1) removeAttributeNS removeAttributeNode -

setAttributeNS is the only method for namespaced attributes which expects the fully qualified name, i.e. "namespace:localname".

Specification

DOM Level 2 Core: setAttributeNS

DOM-Level-2-Core: glossary qualified name

Document Tags and Contributors

Last updated by: sideshowbarker,